Rotatable Drill Collar Connector With Multi-Core Coaxial Electrical Joints
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Solution Overview
Problem
Existing drill collar connectors for logging while drilling instruments face challenges in reducing volume and weight due to integrated conductive slip rings, making them difficult to replace and maintain, while also requiring complex electrical and liquid connections.
Innovation Solution
A connecting structure featuring rotatable male and female joints with multi-core coaxial electrical connectors and conductive slip rings, allowing for easy assembly and replacement, reducing volume and weight, and maintaining electrical and liquid connections without positional identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive slip ring is directly installed on and integrated with the drill collar connector, then electrical connection is established, but the volume of the drill collar connector becomes relatively large and it is difficult to replace the conductive slip ring
Solution Approach 1:
The patent divides the drill collar connector into separate components: the connector body and the conductive slip ring assembly. The conductive slip ring is mounted on a separate bracket that can be independently installed and removed from the connector body, allowing for segmentation of functions and easier replacement without replacing the entire connector assembly.
Solution Approach 2:
The conductive slip ring is extracted from the integrated structure and mounted on a separate bracket assembly. This allows the slip ring to be taken out and replaced independently from the main connector body, reducing the overall volume requirement and improving maintainability while preserving electrical connection functionality.
2Reliability
If a conductive slip ring is directly installed on and integrated with the drill collar connector, then electrical connection is established, but it is difficult to replace the conductive slip ring
Solution Approach 1:
The connector assembly is segmented into the connector body and the slip ring bracket assembly. The bracket is designed with a separate mounting structure that allows the conductive slip ring to be independently accessed and replaced without disturbing the main connector body, significantly improving ease of repair.
Solution Approach 2:
The conductive slip ring is extracted from the integrated connector structure and mounted on a removable bracket. This extraction allows the slip ring to be easily removed and replaced by simply detaching the bracket, making maintenance straightforward while maintaining reliable electrical connection during operation.
3Reliability
If plug and socket are installed in the centers of the connecting parts, then electrical connection is established, but the structure becomes more complex
Solution Approach 1:
The patent extracts the electrical connection function from the traditional plug-and-socket center configuration and relocates it to the outer circumference via conductive slip rings on the bracket. This simplifies the overall connection structure by using the existing rotational interface rather than requiring separate centralized electrical connectors.
Solution Approach 2:
The drill collar connector interface serves multiple functions: mechanical connection, rotational movement, and electrical connection. By integrating the conductive slip rings into the existing connector bracket structure, the system achieves multi-functionality without adding separate plug-and-socket assemblies, thereby reducing overall structural complexity.
Data Source
AI summary
A connecting structure for a drill collar of a logging while drilling instrument and drill collar sub male and female joints are provided. The connecting structure for a drill collar of a logging while drilling instrument includes a male connecting joint and a female connecting joint matched with each other. The male connecting joint and the female connecting joint are rotatable relative to each other. Electrical passages are respectively arranged in the male and female connecting joints. One of the male and female connecting joints is provided with a multi-core coaxial electrical male connector connected with the electrical passage, and the other is correspondingly provided with a multi-core coaxial electrical female connector connected with the electrical passage. The male connecting joint is coaxially nested in the female connecting joint. The multi-core coaxial electrical male connector is inserted into and fitted to the multi-core coaxial electrical female connector.